# Post Microsoft Teams chat message

Canonical URL: https://docs.fuse.init.inc/integrations/microsoft-teams/actions/chat_messages.post

Post a message to a chat as the connected user.

Action ID: `chat_messages.post`
Provider: Microsoft Teams (`microsoft_teams`)
Contract version: 1

## Risk and exposure

- Risk: Write
- Idempotency: Unsafe — Retries may duplicate side effects; callers must coordinate carefully.
- Availability: Default
- Exposure: REST, SDK, MCP
- MCP hints: readOnly=false, destructive=false, idempotent=false, openWorld=true

## Required scopes

- `ChatMessage.Send`

## Input schema fields

- `chat_id`
- `body_content`
- `body_content_type`

## Output schema fields

- `id`
- `body_content`
- `body_content_type`
- `from_user_id`
- `created_at`
- `web_url`
- `reply_to_id`

Provider overview: https://docs.fuse.init.inc/integrations/microsoft-teams
Actions index: https://docs.fuse.init.inc/integrations/microsoft-teams/actions
Exact canonical JSON contract: https://docs.fuse.init.inc/api/catalog/v1/providers/microsoft_teams/actions/chat_messages.post
Deployment-effective discovery: https://api.fuse.init.inc/v1/tenants/%7Btenant_id%7D/providers/microsoft_teams/actions